docs: def _calculate_sunrise_hour_angle(self, solar_dec, depression=0.833):
          """Calculate hour angle for sunrise time in degrees."""
  
          hour_angle_arg = math.degrees(math.acos(
              math.cos(math.radians(90 + depression)) /
              (math.cos(math.radians(self.latitude)) * math.cos(
                  math.radians(solar_dec))) -
              math.tan(math.radians(self.latitude)) *
              math.tan(math.radians(solar_dec))
          ))
  
          return hour_angle_arg